3 months, then I canceled my VPS plan because it's a bad server, too slow for sites that have a lot of visits. It's been 4 months since I canceled and I still receive charges every month. It's no use complaining, they are synical and keep sending you billing invoices. This is ridiculous and goes against the business ethics they say they have. Never hire InterServer if you want to grow your site. On the InterServer server WordPress emails do not work. Your site is very slow for hours and hours and you only have support from a certain contracted amount. But if you want to waste your time and money, you can ignore this message.